...
Enable this setting to only allow students with @sps.org google accounts to join your meeting. This will help prevent classroom disruptions. This setting is adjusted on each of your scheduled meetings or on your personal meeting room. Note: To allow other users into your meeting that do not have a @sps.org google account uncheck the “Require authentication to join” setting first. If you are in an existing meeting this will require you to restart the meeting to take effect.
Prerequisites: Spsmail.org Zoom meetings account.
...
From the dropdown select the “Select this for Student Online Classes”.
...
Click the “Save” button.
Only Allow Authorized Users on Personal Room
...
Go to Zoom.us
Sign in with your spsmail.org account.
...